Rating
| Concentration | 20 °C | 50 °C | Remark |
|---|---|---|---|
| 3 % | B | B | |
| 50 % | B | B | |
| 98-100 % | C | C |
Material comparison at 20 °C
Resistance overview
The resistance of Polysulfone to Formic Acid is concentration-dependent. Across the 3 tested concentrations (3 %, 50 %, 98-100 %), the 20 °C rating ranges from B at lower concentrations to C at higher ones. This means engineers must verify which concentration their process actually involves before relying on a single rating. The rating remains stable between 20 °C and 50 °C, which means this material can also handle moderately elevated process temperatures without additional risk.
Application context
Formic Acid is commonly encountered in laboratory work and chemical processing. Polysulfone (Polysulfone) is a thermoplastic typically used for tanks, piping, containers and liners. Because Formic Acid is classified as corrosive, the choice of containment material is especially critical to prevent leaks, equipment damage, and safety hazards.
Practical recommendation
Polysulfone has limited resistance to Formic Acid and should only be used for short-term or intermittent contact at ambient temperature. The C rating means the material undergoes noticeable changes — swelling, loss of strength, or surface degradation — that make it unsuitable for permanent installations. For prolonged or continuous exposure, HDPE, LDPE, PMP offer significantly better resistance and are rated A.
Did you know?
Polysulfone is commonly chosen for tanks, piping, containers and liners because of its combination of chemical resistance, mechanical strength, and cost-effectiveness.
Materials rated A or B at 20 °C
Based on the row for 98-100 %, 20 °C.
- Thermoplastics
- HDPE A, PP A, LDPE A, PVC Flexible A, PMP A
- Fluoropolymers
- PTFE A, PVDF A, FEP A, ECTFE/ETFE A
- Metals
- SS 316 A, SS 304 A, Aluminium A
About Polysulfone
Polysulfone withstands hot water and steam. Ketones, esters and chlorinated and aromatic solvents attack it.
Rating scale
- A very good resistance
- B good resistance
- C limited resistance
- D not resistant
- – no data
- K no general statement possible
A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.
About this data
The ratings come from the chemical resistance list published by Bürkle GmbH, which compiled them from raw-material manufacturers’ data. They describe laboratory tests on the raw material at 20 °C and 50 °C.
A finished part also sees pressure, mechanical stress, welds and mixtures that a laboratory test does not. Treat the rating as a first filter and test under your own conditions before relying on it.